(Figure not rendered in text, but description: Original mono spectrogram shows energy concentrated 100Hz–5kHz with noise floor at -50dB. Remastered version shows extended response to 16kHz, noise floor lowered to -85dB, but with occasional "holes" where aggressive NR removed percussive harmonics.)
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| Song (Film, Composer, Year) | Original Characteristics | Remastered Version (Label) | Perceptual Difference | |----------------------------|--------------------------|----------------------------|----------------------| | "Aadal Kalaiye" (Paarthaal Pasi Theerum, M.S. Viswanathan, 1962) | Narrow mono, prominent midrange (2-4kHz), moderate tape hiss, vinyl crackle. | Saregama Hify (2021) | Reduced hiss, boosted bass (60Hz), widened vocal presence. Violin section appears artificially spread. | | "Ninaivo Oru Paravai" (Sigappu Rojakkal, Ilaiyaraaja, 1978) | Early stereo with limited separation; warm but muddy low-mids; analog saturation. | Echo Recording Co. (2022) | Cleaned low-mids, retained stereo imaging, subtle high-shelf boost (8kHz). Preserved dynamic range (DR12). | | "Sundari Kannal" (Dalapathi, A.R. Rahman, 1991) | Original digital recording (DAT); harsh high frequencies, limited headroom. | Sony DSD Remaster (2019) | Smoothed transients, added depth, reduced sibilance. Considered successful "restoration" not "alteration". | tamil old songs digitally remastered
